Simple categories matching unpredictable:

• situation,
• misfortune,
• circumstances,
• risk,
• event,
• action,
• occurrence,
• sound,
• signal,
• disturbance,
• system,
• domain,
• force,
• hazard,
• storm,
• shock,
• danger,
• condition,
• motion,
• thing,
• behaviour,
• illness,
• cause,
• change,
• break,
• current,
• disaster,
• disorder,
• catastrophe,
• episode,
• weather,
• upheaval,
• phenomenon,
• accident,
• disease,
• fluctuation,
• elements,
• process,
• blessing,
• noise,
• disruption,
• object,
• problem,
• incident,
• contingency,

Members with property unpredictable:

• system_crash,
• fire,
• discovery,
• flood,
• automotive_strike,
• hurricane,
• accident,
• oil_shock,
• injury,
• pandemic,
• power_breakdown,
• natural_disaster,
• job_insertion,
• blizzard,
• rush,
• head_movement,
• rush_order,
• suppressing_fire,
• technical_failure,
• explosion,
• traffic_incident,
• earthquake,
• exception,
• storm,
• disease_outbreak,
• weather,
• war,
• shooting,
• devaluation,
• accidental_breakage,
• mental_illness,
• change,
• breaking_news,
• abnormal_breakdown,
• heavy_rain,
• stock-market_crash,
• queen-mother_death,
• chronic_asthma,
• avalanche,
• table_drop,
• indian-ocean_tsunami,
• train,
• famine,
• major_storm,
• avalanche_scar,
• technological_advance,
• cyclone,
• sea_spike,
• machine_delay,
• car_repair,
• health,
• actual_event,
• traffic_noise,
• real_world,
• multiple_sclerosis,
• window_opening,
• dog,
• emergency_operations,
• road_accident,
• sport_event,
• breakdown_repair,
• storm_damage,
• external_shock,
• government_regulation,
• car_accident,
• wildfire,
• traffic_congestion,
• pathogen_attack,
• computer_trouble,
• eclipse,
• snow_storm,
• mechanical_problem,
• geopolitical_event,
• traffic_flow,
• additional_wind,
• mass_shooting,
• construction_activity,
• great_migration,
• vandalism,
• mechanical_failure,
• sickness,
• virus,
• labor_strike,
• strike,
• negligence,
• technological_innovation,
• weather_storm,
• plant,
• bankruptcy,
• utilization,
• natural_catastrophe,
• financial_collapse,
• breakdown,
• chemical_exposure,
• lawsuit,
• eruption,
• train_failure,
• temperature_drop,
• sex,
• specific_sound,
• weather_delay,
• asthma,
• noise_signal,
• trial,
• repair_request,
• rumor,
• untimely_death,
• interruption,
• exchange,
• hailstorm,
• volcano,
• fire_accident,
• lightning,
• traffic,
• weather_change,
• vibration,
• failure,
• growth,
• drop,
• tornado,
• building_boom,
• parent_divorce,
• search_effort,
• luck,
• network_load,
• major_news,
• sudden_illness,
• grain_crisis,
• child,
• mouse_movement,
• windstorm,
• storm_surge,
• sudden_discovery,
• volcanic_eruption,
• premature_death,
• user_error,
• gear_failure,
• hardware_failure,
• industrial_dispute,
• election,
• disaster,
• acorn,
• disturbance,
• relationship_breakdown,
• psoriasis,
• calamity,
• weather_emergency,
• pollution,
• blackout,
• chance_materialization,
• reaction,
• catastrophic_disaster,
• introduction,
• minor_tornado,
• main_failure,
• sabotage,
• erratic_shift,
• pestilence,
• power_surge,
• human_disturbance,
• family_emergency,
• cosmic_ray,
• epilepsy,
• sudden_thunderstorm,
• default,
• solar_flare,
• revolution,
• natural_calamity,
• terrorism,
• equipment_breakdown,
• thunderstorm,
• machine_repair,
• resignation,
• illness,
• phonograph,
• job_loss,
• storm_tide,
• schedule_change,
• suicide,
• riot,
• sudden_occurrence,
• global_climate,
• quality,
• mass,
• computer_theft,
• traffic_accident,
• recovery,
• emergency_intervention,
• music,
• holocaust,
• absence,
• unscheduled_maintenance,
• price,
• flood_damage,
• crash,
• track,
• customer_plant,
• process_failure,
• machine_breakdown,
• cyclic_thing,
• air-traffic_control,
• phone_ringing,
• white_noise,
• formation,
• inflation,
• involuntary_separation,
• car_problem,
• traffic_situation,
• regional_weather,
• disease,
• disk_crash,
• theft,
• major_epidemic,
• plane_crash,
• special_event,
• road_works,
• totalitarianism,
• wind,
• plant_shutdown,
• merger,
• user_keystroke,
• epileptic_seizure,
• school_play,
• collision,
• medical_emergency,
• gust,
• pulmonary_infection,
• climatic_condition,
• snow_cover,
• home_fire,
• actuator_failure,
• solar_storm,
• polio,
• civil_war,
• sequence,
• aircraft,
• automobile_accident,
• biological_response,
• volcano_eruption,
• strong_wind,
• ms,
• tsunami,
• crisis_situation,
• solar_activity,
• increase,
• broadband_noise,
• depth,
• cpu_load,
• social_interaction,
• design_change,
• gateway,
• sars_epidemic,
• high_wind,
• helmet,
• system_failure,
• localized_disturbance,
• flu_epidemic,
• rain,
• criminal_activity,
• airway_trauma,
• price_change,
• flash,
• influenza,
• labor,
• terrorist_attack,
• emergency,
• dock_strike,
• unexpected_demand,
• tropical_cyclone,
• severe_storm,
• hail,
• retail_bankruptcy,
• server_load,
• shock,
• dancing,
• unexplained_losses,
• repair,
• legal_issue,
• apple,
• unauthorized_overload,
• industrial_action,
• civil_strife,
• vehicle_breakdown,
• skin,
• wave,
• loss,
• physical_injury,
• severe_thunderstorm,
• death,
• liquidation,
• wind_system,
• coup,
• seismic_activity,
• friction,
• religious_event,
• corner_drop,
• foreign_war,
• news,
• drought,
• sle,
• construction_disaster,
• economic_crisis,
• competitive_response,
• emotion,
• collapse,
• act,
• motion,
• industrial_accident,
• closure,
• epidemic,
• machine_failure,
• serious_accident,
• random_failure,
• rain_storm,
• academic_issue,
• landslide,
• cloud_formation,
• price_fluctuation,
• tropical_storm,
• labor_dispute,
• weather_pattern,
• system_breakdown,
• safety_incident,
• flu,
• attacking_human,
• aggression,
• scramble,
• human_error,
• connection_failure,
• order_cancellation,